Table 2.10 shows the resistivity and TCR ( ? ) of Cu?Ni alloys. Plot TCR versus 1/ ? , and obtain the best-fit line. What is your conclusion? Consider the Matthiessen rule, and explain why the plot should be a straight line. What is the relationship between ? Cu, ? Cu, ? CuNi, and ? CuNi? Can this be generalized?

NOTE: ppm-parts per million, i.e., 10????-6.

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Table 2.10 Cu-Ni alloys, resistivity, and TCR Resistivity (n52 m) TCR (ppm °C-¹) 0 17 4270 Ni wt.% in Cu-Ni 6 2 50 1350 100 550 11 150 430 20 300 160 Table 2.10 Cu-Ni alloys, resistivity, and TCR Resistivity (n52 m) TCR (ppm °C-¹) 0 17 4270 Ni wt.% in Cu-Ni 6 2 50 1350 100 550 11 150 430 20 300 160

Answer rating: 100% (QA)

The plot of temperature coefficient of resistivity TCR versus 1 is as follows Fi... View the full answer